大悬臂预应力混凝土盖梁不落地支架体系及稳定性评价  

Large Cantilever Prestressed Concrete Cover Beam Non-Supported Template System and Stability Evaluation

作　　者：于剑波 YU Jianbo(Haiwei Engineering Construction Co.,Ltd.of China First Highway Engineering Co.,Ltd.,Bejing 101119,China)

机构地区：[1]中交一公局海威工程建设有限公司,北京101119

出　　处：《北方建筑》2025年第2期58-62,共5页Northern Architecture

基　　金：中交一公局海威工程建设有限公司科技研发项目(hwgs-ygj-2022-01)。

摘　　要：城市高架桥大悬臂盖梁施工通常需要搭设支架,但在城市道路施工中,由于空间和交通条件的限制,传统支架的搭设往往难以实施。以G312国道镇江句容段高架桥改扩建工程为例,该路段交通流量大,传统支架的施工方式不适宜大规模应用。为此,本文结合现场实际情况,提出了一种大悬臂预应力盖梁不落地支架结构。通过构建数值分析模型,依托Midas Civil软件对其稳定性进行了评估,同时对经济效益进行了分析。结果表明,该支架体系具有良好的施工稳定性。通过在支架上架设模板以完成盖梁施工,不仅有效解决了大悬臂盖梁施工中落地支架对交通造成的严重阻碍问题,而且周转使用便捷,带来了显著的经济效益。The construction of long cantilever bent caps on urban elevated bridges typically requires the installa-tion of scaffolding.However,in urban road construction,due to limitations in space and traffic conditions,the in-stallation of traditional scaffolding is often difficult to implement.Taking the reconstruction and expansion project of Zhenjiang-Jurong Section of G312 National Highway as an example,the traffic flow of this section is large,and the traditional construction method of support is not suitable for large-scale application.Therefore,based on the actual situation of the field,a non-ground support structure for the construction of the large cantilever prestressed bent cap is proposed.By constructing a numerical analysis model and relying on Midas Civil software to evaluate its stability,the economic benefits were also analyzed.The results indicate that the support system has good con-struction stability.By setting up templates on the support structure to complete the construction of the bent cap,not only does it effectively solve the serious obstruction problem caused by the landing scaffoldings in the con-struction of large cantilever bent caps to traffic,but it is also convenient to use and brings significant economic benefits.

关 键 词：大悬臂盖梁施工 不落地支架 施工工艺 稳定性评价 效益分析 

分 类 号：TU378.202[建筑科学—结构工程]